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Avalanche Forecast

Archived

Mar 11th, 2026–Mar 12th, 2026

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Microwave-Sinclair, North Bulkley, South Bulkley, Telkwa.

Convective flurries and periods of sun may be enough for a wet loose problem.

Wet loose avalanches can start small but may gain enough mass to trigger wind slabs. Keep overhead hazards in mind.

Confidence

Moderate

  • We are uncertain about how quickly persistent slabs are gaining strength.

Avalanche Summary

In the Seaton area the field team reported a very large natural avalanche size 3.5 that occurred on the weekend during the storm. This avalanche released on the facet/crust layer. They also had several whumpfs and remotely triggered a small size 1 in a shallow rocky terrain feature where the persistent weak layer was close to the surface.

Numerous size 2 to 2.5 wind slab avalanches occurred over the weekend.

Snowpack Summary

Up to 10 cm of low density snow from overnight convective flurries and clear skies during the day may be enough initiate small loose snow avalanches.

This new snow overlies wind affected snow, with wind slabs in lee terrain features. Wind slabs remain reactive and are slow to bond to previously heavily wind pressed surfaces. A surface crust can be found up to 1500 m.

Below this, a layer of facets from early February and a thick crust from late January are at a similar depth between 70 and 110 cm deep. This layer remains possible to trigger with large loads and is likely found more easily on north facing slopes.

Weather Summary

Wednesday Night
Partly cloudy. 5 to 10 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -8 °C.

Thursday
Mostly sunny. 20 km/h west ridgetop wind. Treeline temperature -9 °C.

Friday
Mostly sunny. 1 to 3 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -9 °C.

Saturday
Mostly sunny. 1 to 2 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -9 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.